When Kurt Weber inherits his great-uncle's lakeside house, he finds traces of the dark secrets of his family's past. The early inhabitants of the house haunt his dreams nightly. And one day a ghostlike woman appears before him, hiding herself in a room that had been kept locked throughout his childhood. Inside, Kurt finds a hidden stash of photographs, letters and documents. As he deciphers them, he gradually understands the degree of his family and his neighbours' complicity in wartime horrors.